Komatsu Galeo PC138US-8 User Manual

40 Troubleshooting SEN02465-01
PC138US, USLC-8
37
Failure code [DW91KB] Travel junction sol short 1
Circuit diagram related
User code Failure code
Trouble
Travel junction solenoid system short
(Pump controller system)
— DW91KB
Contents of
trouble
• When output to travel junction solenoid was turned ON, short circuit was detected in circuit.
Action of
controller
• Turns output to travel junction solenoid OFF.
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
Problem that
appears on
machine
• Machine is not steered easily during travel.
Related
information
• Operating condition of travel junction solenoid can be checked with monitoring function.
(Code: 02300 Solenoid 1)
• Method of reproducing failure code: Start engine + Steer machine with right and left travel levers.
Possible causes
and standard
value in normal
state
Cause Standard value in normal state/Remarks on troubleshooting
1
Defective travel junction
solenoid (Internal short cir-
cuit or ground fault)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
V04 (male) Resistance
Between (1) – (2) 20 – 60 z
Between (2) – chassis ground Min. 1 Mz
2
Ground fault in wiring har-
ness (Short circuit with GND
circuit)
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
Wiring harness between C02 (female) (110)
– V04 (female) (2)
Resis-
tance
Min. 1 Mz
3 Defective pump controller
a Prepare with starting switch OFF, then carry out troubleshoot-
ing without turning starting switch ON.
C02 (female) Resistance
Between (110) – (115), (117),
(120)
20 – 60 z
Between (110) – chassis ground Min. 1 Mz

Komatsu Galeo PC138US-8 Specifications

General

Brand	Komatsu
Model	Galeo PC138US-8
Category	Excavators
Language	English